gnu: libtheora: patch ancient config.guess to support mips64.

* gnu/packages/patches/libtheora-config-guess.patch: New file.
* gnu/packages/oggvorbis.scm (libtheora): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu-system.am

@@ -240,6 +240,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/hop-bigloo-4.0b.patch			\
   gnu/packages/patches/libevent-dns-tests.patch			\
   gnu/packages/patches/libffi-mips-n32-fix.patch		\
+  gnu/packages/patches/libtheora-config-guess.patch		\
   gnu/packages/patches/libtool-skip-tests.patch			\
   gnu/packages/patches/libtool-skip-tests-for-mips.patch	\
   gnu/packages/patches/m4-gets-undeclared.patch			\

gnu/packages/oggvorbis.scm

@@ -100,7 +100,8 @@ polyphonic) audio and music at fixed and variable bitrates from 16 to
                                  version ".tar.xz"))
              (sha256
               (base32
-               "0q8wark9ribij57dciym5vdikg2464p8q2mgqvfb78ksjh4s8vgk"))))
+               "0q8wark9ribij57dciym5vdikg2464p8q2mgqvfb78ksjh4s8vgk"))
+             (patches (list (search-patch "libtheora-config-guess.patch")))))
     (build-system gnu-build-system)
     (inputs `(("libvorbis" ,libvorbis)))
     ;; The .pc files refer to libogg.

gnu/packages/patches/libtheora-config-guess.patch

@@ -0,0 +1,37 @@
+Minimally patch libtheora's ancient config.guess to support mips64.
+
+--- libtheora/config.guess.orig	2009-02-23 22:50:50.000000000 -0500
++++ libtheora/config.guess	2013-10-31 23:49:48.155999944 -0400
+@@ -798,25 +798,24 @@
+     m68*:Linux:*:*)
+ 	echo ${UNAME_MACHINE}-unknown-linux-gnu
+ 	exit 0 ;;
+-    mips:Linux:*:*)
++    mips:Linux:*:* | mips64:Linux:*:*)
+ 	eval $set_cc_for_build
+ 	sed 's/^	//' << EOF >$dummy.c
+ 	#undef CPU
+-	#undef mips
+-	#undef mipsel
++	#undef ${UNAME_MACHINE}
++	#undef ${UNAME_MACHINE}el
+ 	#if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
+-	CPU=mipsel
++	CPU=${UNAME_MACHINE}el
+ 	#else
+ 	#if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
+-	CPU=mips
++	CPU=${UNAME_MACHINE}
+ 	#else
+ 	CPU=
+ 	#endif
+ 	#endif
+ EOF
+-	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^CPU=`
+-	rm -f $dummy.c && rmdir $tmpdir
+-	test x"${CPU}" != x && echo "${CPU}-pc-linux-gnu" && exit 0
++	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
++	test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit 0; }
+ 	;;
+     ppc:Linux:*:*)
+ 	echo powerpc-unknown-linux-gnu